What position did Ricky Williams primarily play?

What position did Jamal Lewis primarily play? Jamal Lewis is best known for playing with which NFL team? Which college was Jamal Lewis playing for when he entered the NFL? What jersey number did Jamal Lewis wear with the Ravens? Ricky Williams is best known for playing with which NFL team? Which college was Ricky Williams playing for when he entered the NFL? What jersey number did Ricky Williams wear with the Dolphins? What position did Eddie George primarily play?